Mathematics, 15.04.2020 15:54 lippj0228
Are Americans superstitious? A Harris (Feb. 2013) poll of over 2,000 adult Americans was designed to answer this question. One survey item concerned the phrase "see a penny, pick it up, all day long you’ll have good luck." The poll found that about 30 percent of Americans believe finding and picking up a penny is good luck. Consider a random sample of 20 U. S. adults and let x represent the number who believe finding and picking up a penny is good luck. This is a binomial random variable.
A) Find P(x<10)
B) Find P(x>5)
C) What is the expected number (the mean) who believe picking up a penny is good luck.
Answers: 2
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Are Americans superstitious? A Harris (Feb. 2013) poll of over 2,000 adult Americans was designed to...
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